Quality Gate passed when Coverage is <80% ? Why?

I have using 4.25.0 version of SornarQube. i have 2 different project with 0 bug, 0 Vulnerabilities,0 Hotsopts but my coverage is 0.0%. when i build my project on azuredevops one project’s Quality Gate is passed and another Quality gate are failed. why?

By default, the quality condition on coverage and duplication won’t apply if fewer than 20 lines were changed. Could that be the cause? This feature can be disabled in: Administration → Configuration → General Settings → General → Quality Gate.